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From Todd Lipcon <t...@cloudera.com>
Subject Re: Namenode throws NPE, won't start
Date Wed, 07 Jul 2010 06:39:01 GMT
Hey Bradford,

Your image is corrupt. Do you have an image from a second name.dir that has
different md5sums?

It's sometimes possible to restore issues like this, but it usually requires
using a tweaked namenode to skip over the bad data.

-Todd

On Tue, Jul 6, 2010 at 11:23 PM, Bradford Stephens <
bradfordstephens@gmail.com> wrote:

> Hey guys,
>
> Running .20.2 -- namenode refuses to start. Ran fine the last few
> weeks. Any ideas?
>
> Full text: http://pastebin.com/QWZ6A0Ja
> 2010-07-06 23:20:01,524 ERROR
> org.apache.hadoop.hdfs.server.namenode.NameNode:
> java.lang.NullPointerException
>        at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1076)
>        at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1088)
>        at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedMkdir(FSDirectory.java:975)
>        at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedMkdir(FSDirectory.java:962)
>
> --
> Bradford Stephens,
> Founder, Drawn to Scale
> drawntoscalehq.com
> 727.697.7528
>
> http://www.drawntoscalehq.com --  The intuitive, cloud-scale data
> solution. Process, store, query, search, and serve all your data.
>
> http://www.roadtofailure.com -- The Fringes of Scalability, Social
> Media, and Computer Science
>



-- 
Todd Lipcon
Software Engineer, Cloudera

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